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diff --git a/emulators/pcemu/pkg-descr b/emulators/pcemu/pkg-descr new file mode 100644 index 000000000000..812ce717b029 --- /dev/null +++ b/emulators/pcemu/pkg-descr @@ -0,0 +1,238 @@ +[This is David Hedley's original README, FreeBSD port comments below] + + PC Emulator for Unix and X Windows + +As the title suggests, this is a Unix/X windows program which is +designed to emulate a standard 8086 based PC. + +In its current form it runs most text based programs. The programs I have +tried and found to work are as follows: + +MSDOS 5.0 MSDOS 6.2 +WordPerfect 5.1 Borland C++ 2.0 +Turbo Debugger 2.51 Turbo Assembler 2.51 +BBCBasic 4.61 MSDOS QBasic +MSDOS GWBASIC Virtually all program that came with MSDOS 5 +Hitchhiker's Guide to the Galaxy PC Magazine's ANSI.COM +SemWare's QEdit 2.1 Norton Utils 4.50 Advanced Edition +Norton Utils 6.0 Xtree Professional 1.1 +PowerMeter Utils Autoroute (ancient version) +Minitab 8.0 Microsoft Diagnostics + +This is all the programs I could lay my hands on which were text based +and could run on an 8086 + +The emulator runs at about 8-10MHz 80286 speed on a Sun SparcStation +10/40 (without the -mviking flag) and at about 6MHz 8088 speed on a +33MHz 80486 box running Linux. + +I have included a Postscript representation of my project report. It's +a bit out of date now, but it's the closest thing I've got to +documentation! I'll do some kind of latex thing for the next +release.... + +The program rather hogs the cpu but unmapping the window (iconifying +it) will put it to sleep. + +The most recent version of this program will always be in ftp.cs.bris.ac.uk +currently in the directory /users/hedley + +INSTALLING THE EMULATOR + +Edit the Makefile to change the OPTIONS, CFLAGS and XROOT to be +appropriate for your system (I am assuming you are using GNU GCC, +although any ANSI C compiler should work just as well). Ensure you are +using the best (speed) optimisations possible (e.g. -O2 -fomit-frame-poiner) + +Edit the file mytypes.h and ensure that the types for INT8, UINT8, +INT16, UINT16 etc are correct. Hopefully nothing need be changed in +this file, but you never can tell... I have assumed that 'char's are 8 +bit bytes, 'short's are 16 bit words and 'long's are 32 bit words. If +your compiler treats these differently to the above then you will have +to edit this header file. + +Type 'make' and go away and have a cup of tea! Compiling 'cpu.c' takes +a while (and quite a bit of memory!). + +Get a floppy disk of the same size/type as you specified in the Makefile +(i.e. if you chose -DBOOT720, then you'll need a 3.5" 720k disk). Install +MSDOS on it. Copy the files 'config.sys', 'emufs.sys' and 'lredir.exe' from +the 'programs' directory onto this floppy disk. Shove it in your Unix box +and type cp /dev/fd0 DriveA This should create a 720k (or whatever) file +which the emulator can boot from. If you do not have access to a Unix box +with a floppy disk on it, then you can use the supplied 'dumpdisk' program +to create a disk image. All you need is access to a PC. Simply put in a +bootable MSDOS disk into the drive and type dumpdisk A (or dumpdisk B if in +drive B). The program will copy the entire disk to a file called +'drivea'. You must then transfer it to your Unix box... + +You then need to convert the vga font (vga.bdf) into a font format +your X server can understand (either SNF or PCF) using either +'bdftosnf' or 'bdftopcf' and install the resulting font file somewhere +where your X server can find it. Then type 'mkfontdir' to rebuild the +fonts.dir file and then type 'xset fp rehash' to tell your X server +about the new font. If you type 'xlsfonts' you should see 'vga' as one +of the fonts listed. If not, then something has gone wrong. I may or +may not be able to help - it depends on your local setup. The emulator +will run without the font as it uses the standard 8x16 X11 font - +although most programs which use the extended character set will look +pretty terrible. A warning will be displayed if the correct VGA font +cannot be found. If you are using openwindows, you will have to type +'convertfont' and then 'bldfamily' + +You should now be in a position to run the emulator + +By default, the emulator requires the disk image called 'DriveA' to be in +the current directory or else it will complain. If you don't like this, +then you can change the file the emulator boots from by altering your +.pcemurc file (see below) or by changing the default at compile time (by +modifying the Makefile) + +Once run, the emulator should come up with the usual MSDOS banner and +request the current date and time (which should already be +correct). You can now run PC programs, mount Unix directories as +drives etc. You will already have one drive redirection - drive C: is +the Unix root directory. To mount further directories as drives, you +must use the program 'lredir'. Consult the file 'lredir.readme' for +instructions... + + The .pcemurc file + +At present this file allows a few things to be changed at run time. If this +file is found (either in the current directory or in your home directory), +then it is read and parsed and the values overwriting the equivalent +compile time options. Currently the only options supported at present are: + +bootfile diskfile + +where diskfile is the disk image you want to boot from (no quotes or +anything are needed and the filename must not contain white spaces). + +boottype type + +where type is either 360, 720, 144 or 12. This tells the emulator the type +of disk the disk image file represents (360k, 720k, 1.44MB, 1.2MB +respectively). + +updatespeed n + +where n is an integer > 0 +This is the rate at which the screen memory gets checked for changes (and +hence the update speed at which the screen gets updated for non-BIOS +writes). n is measured in internal interrupt ticks of which there are ~72.8 +per second (depends on the resolution of the system timer). + +cursorspeed n + +where n is an integer +This specifies how fast the cursor should flash. Flashing the cursor can +take a fair amount of bandwidth and so on slow/heavily loaded networks it +may be best to slow down the cursor flashing. Setting n to 0 or less will +disable cursor flashing - the cursor will be permanently on. + +An example .pcemurc file can be found in this directory. + +If you have problems compiling or running the emulator, then please contact +me giving details of what went wrong (along with your computer type +etc). + +Architectures tested: + +Computer OS Comments +----------------------------------------------------------------------------- +PC 486/33 Linux 0.99.14w Runs quite well. A bit pointless though :) +Sun 3/60 SunOS 4.1.x Takes an age to compile and not really worth + the effort... +SparcStation 10 SunOS 4.1.3 Runs well. Takes > 20MB RAM to compile though +HP 755/99 HPUX Runs OK (>25MB RAM to compile...) +Sun 4 Solaris 2.3 Runs OK +RS6000 ??? Had a few problems getting it to compile. + Getting there slowly though. +SGI Indigo IRIX 4.?.? Doesn't work if compiled with optimisation + using the standard compiler. Haven't tried + it using gcc yet... + +As you can see this list is quite small. The main limiting factor is the range +of machines I have access to. If anyone else can get it running on other +architectures then please contact me! + +Warning: This program is not secure! Do not make is suid or sgid anything +unless you wish to compromise the security of your system! + +EMULATOR LIMITATIONS etc + +Some parts of the PC architecture are emulated better than others. The +BIOS has been partly implemented - enough to get MSDOS to boot and to +allow most programs to run. Anyhow, most decent programs bypass the +BIOS for screen access. BIOS Disk calls for drive A have been mostly +emulated, although formatting doesn't work. + +Some of the hardware has been emulated but not much. Timer interrupts +are generated by the system but there is now way (at present) to +reprogram the timer. The Programmable Interrupt Controller has been +emulated in part to respond to the End Of Interrupt command and reads +from and writes to the mask register should work OK. + +None of the VGA hardware has been emulated at present (apart from +screen updating) although this will change in the near future. Mode +changes must therefore be done through the BIOS. + +The keyboard has been mostly emulated. The program converts X11 +keysyms to raw PC scan codes and then generates an interrupt 9 as per +usual. There is a BIOS routine which takes these scan codes and +generates the correct BIOS ASCII/scan code pair. The keysyms used can +be found in the module 'xstuff.c'. In the future these keysyms will be +read in from a file at run time. + +THANKS + +Thanks go to the following: + +Andy Norman at HPLabs, Bristol (ange@hpl.hewlett-packard.co.uk) for the HP +port. +Dieter Becker (becker@med-in.uni-sb.de) for help with the Solaris port +Klaas Esselink (esselin1@ksla.nl) for help with the RS6000 port + +Please report bugs/comments etc to me (hedley@cs.bris.ac.uk) and I'll +do my best to sort them out (no guarantees though). After June 25th I +will be leaving University and will not be able to check email very +frequently - please be patient if you want a response - I will reply +eventually. + +Have fun... + +David + + + +[FreeBSD port comments] + +I (joerg_wunsch@uriah.heep.sax.de) have slightly extended the .pcemurc +functionality, in order to improve the handling of international key- +boards. David's code hard-coded the keyboard mapping from XKeyStrings +to PC scancodes. + +I've been adding a .pcemurc section that defines the reverse mapping +from XKeyStrings to PC scancodes, so it's at the very least possible +to remap the keyboard to the original US layout even for international +versions. The syntax for this rules is + + `keymap' <scancode>`='<XKeyString> + +This is my personal .pcemurc file, just to illustrate the usage. + +bootfile /home/joerg/pcemu/DriveA +boottype 720 +keymap 12=ß +keymap 13=' +keymap 21=z +keymap 26=] +keymap 27=+ +keymap 39=\ +keymap 40=[ +keymap 41=^ +keymap 43=# +keymap 44=y +keymap 53=- +keymap 86=< + |